We've been having some stunningly gorgeous weather of late -- clear sunny skies and nearing 70 degrees. I think it was around 65 during our Tuesday outing. There were plenty of benches from which to do sketches. I would definitely go again.
One of the two views I managed to draw:
The second sketch:
You can tell from the photos that it wasn't very crowded on a weekday, so I didn't have to worry about putting any pesky people into my drawings -- always a plus!